package util;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.InputStream;

/**
 * 工具类
 */
public class MyBatisUtil {
    private static SqlSessionFactory factory;
    static{//在静态代码块下，factory只会被创建一次
        try{
            InputStream is=Resources.getResourceAsStream("mybatis-config.xml");
            factory=new SqlSessionFactoryBuilder().build(is);
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    public static SqlSession createSqlSession(){
        return factory.openSession(true);//true为自动提交事务
    }
    public static void closeSqlSession(SqlSession sqlSession){
        if(null!=sqlSession){
            sqlSession.close();
        }
    }


}
